Door closer and stopper



Dec. 14, 1954 \ANTRANIG DER SARKISSIAN 2,696,632

DOOR CLOSERAND STOPPER INVENTOR BY 20% ATTORNEY Filed NOV. 25, 1953United States Patent 2,696,632 noon CLOSER AND STOPPER Antranig DerSa'rkissian, Beirut," Lebanon Application November 25, 1953,'Serial No.394,433

2 Claims. (CI. 1652) The present invention relates to: a 'door closerand stopper and vhas for 'an':object.to provide a device of this kindwhich is adaptedfor 'use'on both hinged'doors and sliding doors.

Another object of the present invention is to provide a dev1ceof thischaracter capable of application to all kindsxof swinging doors from:the lightest-screen doors to heavy and wide doors, such as are found:in institntions, public buildings andindustrial plants.

A further object of the present invention is' to 'provide a door closerandstopper which can be:installed on either right-hand or left-handlhinged doors without changing the assembly of parts.

:The present invention aims to provide adevice of this type which iseasy toinstall and .in which the only maintenance required is theaddition-of a'small amount of grease at long intervals.

The present invention also aims to provide a structure which has beendeveloped with a view to simplicity, ei'liciency, durability, goodappearance and. low manufacturing cost as the larger parts can be madefrom tubing, rods, and the like, of standard or regular stock.

With the foregoing and other objects in view, the invention will behereinafter more fully described and more particularlypointed out in theappended claims.

In the drawing in which the same parts are denoted by the same referencenumerals throughout'theseveral views,

Figure l is a fragmentary horizontal sectional View of a door and a doorcasing having ap'pliedthereto a device constructed in accordance withthepresent invention,

Figure .2 is a front elevational View oftheimproved device,

Figure 3 is a sectional view'taken on the line 3-3 of Figure 2,

Figure 4 is an enlargedfragmentary sectional view of therocking squeezerand associated parts,

I Figure 5 is a sectional view takenon the line- 5 5 of Figure 4,

Figure 6 is a view similar to Figure 4 with the squeezer in its openposition, and

Figure 7 is a fragmentary sectional view of the rocking squeezer andassociated parts showing a modified form of the invention.

Referring more particularly to the drawing, 10 indicates one upright ofa door frame on which a door 11 is pivotally mounted by hinges 12 onlyone of which is shown. The improved door closer and stopper is generallyindicated at A and comprises two telescopic members 13 and 14 which maybe in the form of tubes. The member 13 is of larger diameter than themember 14 and its inner end is open to telescopically receive the inneropen ended portion of the member 14. The outer end of the member 13 isclosed by a solid end portion 15 which is provided with a transverselyextending through bore 16.

The member 13 may be pivotally mounted on the upright 10 by a bracket 17which may be substantially U- shaped in cross section and have a pair ofspaced apart parallel legs 18 and a connecting portion 19. The bracket17 may be attached to the upright 10 by screws or other suitablefastening elements which extend through suitable openings in the portion19 of the bracket and into the upright 10. The closed end portion 15 ofthe member 13 is received between the legs 18 of the bracket with thebore thereof in alignment with suitable aligned holes in the legs 18.Apintle21- is inserted through the aligned holes in the legs and thebore. A substantially circular boss '22 is secured or formed integralwith the inner face of the closedend portion 15 and the "innerface oftheadjacent wall of the tube 13. The boss 22 has a reduced inner endportion 23 which forms an annular seat v24 for the outer end of: a coilspring 25. The inner end of the coil spring-'25 a'buts aganist the outerend of a guide member 26, the main body portion of which issubstantially circular and has a sliding fit on the inner face of thewall of the-tube1 3. The member 26' has an inner end portion-27 ofreduced diameter which is 'exteriorly screwthreaded 'as -at 28 toreceive the interiorlv screw threaded inner end portion 29 of the tube14. The reduced portion 27 .of the member. 26' forms air-annularshoulder 30 upon -Which: seats the inner edge of the tube 14. Outwardlyof the outermost screw thread on the tube 14 there is'formed; on theinner face ofthe wall of thevtube 14 a circular recess 31 which receivesthe flange 32 of a truncated cone shaped packing member 33 so that whenthetube 141's screwed home on the member 26 the flange 32 will befrictionallyheld in the recess 31 by the free end of the, portion .27. Iv I The packing member -33 and the guide member 26 have aligned throughpassages 34 and '35 through which extends a rod 36,' the outer endofwhich is screw threaded as at 37 {and isreceived 'by a screw threadedbore 38 formed inathe boss 22. CTh'e inner endportion of therod '36-.isflattenedasat 39 and its extreme inner end part. is received by a socket40 formed in a rocking squeezer or valve member 41 which is pivotallymounted on the flattened end of the' rod 36 by a pivot pin 42 extendingthrough suitable aligned holesin the squeezer 41 and the rod.36. Thebottom 43* of the socket 4t) and the end 44 -of the rod 36 arecooperatingly curved to permit free rocking movement of the squeezer 41'with. respect to the rod'36. The rocking squeezer '41 is substantiallyhemispherical and its inner face 41a is substantially dome-shaped andits outer face 41b is flat. The inner and outer faces of the squeezerare joined by an annular portion 41c which is arcuate in cross-sectionand is spaced from'the inner face of the wall of the tube 14.

The outer end of the tubularmember14 is closed by a solid end portion 45which is provided withfa transversely extending through'bore 46. Themember 14 may be? pivotally mounted on the door "11 by a 'brack'etj47which may be similar to the bracket 17. V The bracket 47 has apair of'spacedapart parallel legs "481a'ndfaf connecting portion 49. Thebracket 47 may be attachedto the door 11 by serews-fsopr' other suitablefastefningelements which 'ext'e'nd'through appropriate openings in theportion 49 of the bracket47 and into thedoor. The closed'eridzpor tion'45 of the memb'er14j 1s rece1ved'he tween thelegs48of the brack'e't47'w1th the bore'46 thereof in alignment with suitable aligned holes inthe legs 48. A pintle 51 extends through the aligned holes in the legsand the bore.

The tube 14 has a screw threaded filling opening 52 for the introductionof grease into the chamber 53. The opening 52 may be closed by aremovable screw threaded plug 54.

In order to prevent inward telescoping of the tubes 13 and 14 andconsequently the opening of the door, the tube 13 has formed in its walldiametrically aligned holes 55 for receiving a stop pin 56 held captiveby a chain 57, one end of which is secured to the tube 13 by a staple58, or the like, adjacent the inner end of the tube 13 and the oppositeend of the chain is attached to the pin 56. The holes 55 are disposedadjacent to the outer end of the guide member 26 when the door 11 andthe member are in their fully door closed position so that, when the pin56 is positioned in the holes 55, the pin will be disposed between thetwo innermost convolutions of the spring 25 so as to arrest any movementof the member 26 and the tube 13 in its door opening direction.

The door may be held open at any desired angle or to any extent by aholding chain 59, one end of which is secured to the staple 58. Thelinks of the chain 59 may be selectively engaged over the head 60 of thepintle 51 to hold the door in the desired open position. Such anarrangement will not interfere with the further opening of the door, butwill permit the door to return only to its selected partially openposition. The links of the chain 59 will have frictional engagement withthe head 60 of the pintle 51 to prevent accidental escape of theselected link from the head 60, but to permit intentional removaltherefrom by the hand of the user.

In the use of the device, the chamber 53 will be filled to capacity witha fairly heavy grease, for example, one having the weight of theconventional grease used in door checks of this type.

When the door begins to open, the distance between the pintles 21 and 51will decrease, the spring 25 will be compressed and the squeezer 41 willrock on its pivot 42 in a clockwise direction to the position shown inFigure 6 of the drawing. In this position the squeezer will offer littleresistance to the passage of the grease in the chamber 53 therearoundand the dome-shaped contour of its inner face 41a and the arcuateportion 410 will further minimize the resistance of the squeezer to thepassage of the grease therearound as the tube 14 telescopes into thetube 13 during the opening movement of the door. The grease which passesaround the member 41 will be trapped by the packing member 33. Therocking of the squeezer is made possible by the fact that, while thesqueezer is in a vertical position, there are two forces acting upon it.One force, that is, compression, acts on surface 41b and another force,that is, a suction force, acts on surface 41a creating a vacuum. Thesqueezer automatically rocks back, with the help of the rod 36 thatpushes it back into tube 14, while the door is being opened. Thecompressed grease escapes around the edge of the squeezer gradually thuscontrolling the expansion of the spring 25.

As soon as the user releases the pressure on the door, the spring 25will begin to expand and move the member 26 to the right looking atFigure 3 of the drawing and the squeezer 41 will rock back to itsvertical position shown in Figures 3 and 4 of the drawing. In thisposition of the squeezer, in cooperation with the packing member 33 itwill act as a dashpot and retard the closing movement of the door underthe influence of the spring 25 and prevent slamming of the door. Theflat face 41b will enhance the effectiveness of the squeezer in itscapacity of a damper.

The packing member 33 prevents the leakage of grease from the chamber 53along the rod 36 and between the tube 14 and the portion 27 of themember 26. The member 26 serves as a guide for keeping the telescopicmembers 13 and 14 in alignment, as a support and guide for the rod 36and as an abutment for one end of the spring 25.

In the form of the invention illustrated in Figure 7 of the drawing, aneedle-like rod 33a is firmly embedded in the packing 33 and extendsfrom the packing 33 towards the squeezer 41 a suflicient distance sothat the free end of the rod will contact the outer face of the squeezerwhen the parts have almost reached the end of their self closingmovements, that is when the door is about to latch. At this {time thesqueezer 41 will be rocked by the rod 33a to its fully open position andat this point the compression of the grease is released therebyreleasing the drag so as to provide enough force for latching the door.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above specifically describedembodiment of this invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims.

Whatl claim is:

1. A door closer and stopper comprising two telescoping members one ofwhich is adapted to be movably connected to a door and the other ofwhich is adapted to be movably connected to the door frame, means onsaid members for permitting free opening of the door and for retardingthe closing movement of the door to prevent slamming thereof comprisinga grease chamber in said one telescoping member, a rod fixed to saidother telescoping member, a valve member on said rod and disposed insaid grease chamber, grease entrapping means within said grease chamberand cooperating with said valve member to provide a dashpot andresilient means in said other telescoping member for urging said greaseentrapping means towards said valve member for moving the entrappedgrease past said valve member in a dashpot action during the closingmovement of the door to prevent slamming of the door, said valve memberbeing substantially hemispherical and having a fiat face, a dome-shapedface and an annular portion joining said flat face and said dome-shapedface, said annular portion being arcuate in cross-section and spacedfrom the wall of said grease chamber, a guide member having a slidingfit with said other telescoping member and connected to said onetelescoping member, and a packing member carried by said guide memberand said one telescoping member, said rod extending through said guidemember and said packing member and serving as a guide and supporttherefor.

2. A door closer and stopper as claimed in claim 1 wherein a rod iscarried by said packing member and extends therefrom towards said valvemember for engaging said valve member, and moving it to its fully openposition immediately before the end of the door closing movement of theparts to release the compression of the grease and to cause the door tolatch.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,131,264 Pearson Mar. 9, 1915 1,149,790 Sherwood Aug. 10,1915 2,128,030 Koleno Aug. 23, 1938 2,227,656 Lindsay Jan. 7, 194].

